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Finding the Fourth Proportional to 778,899.20, 1,093,408 and 778,899.20

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Solution

The fourth proportional to 778,899.20, 1,093,408 and 778,899.20 is: 1,093,408

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,899.20 : 1,093,408 = 778,899.20 : x
  2. Step 2: Convert to fraction form
    778,899.20/1,093,408 = 778,899.20/x
  3. Step 3: Cross multiply
    778,899.20x = 1,093,408 × 778,899.20
  4. Step 4: Simplify right side
    778,899.20x = 851,654,616,473.60
  5. Step 5: Solve for x
    x = 851,654,616,473.60/778,899.20
  6. Step 6: Final answer
    x = 1,093,408

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.